MIPS: Fix build error due to multiple prom_putchar() definitions.

This can happen if both the generic 8250 and another early console
driver are enable.  Fixed by using an auxilliary kconfig symbol to
restrict that choice.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 7 insertions, 3 deletions

diff --git a/arch/mips/Kconfig.debug b/arch/mips/Kconfig.debug
index b147e7038ff0..25de29211d76 100644
--- a/arch/mips/Kconfig.debug
+++ b/arch/mips/Kconfig.debug
@@ -21,13 +21,17 @@ config EARLY_PRINTK
           unless you want to debug such a crash.
 
 config EARLY_PRINTK_8250
-        bool "8250/16550 and compatible serial early printk driver"
-        depends on EARLY_PRINTK
-        default n
+        bool
+        depends on EARLY_PRINTK && USE_GENERIC_EARLY_PRINTK_8250
+        default y
         help
+          "8250/16550 and compatible serial early printk driver"
           If you say Y here, it will be possible to use a 8250/16550 serial
           port as the boot console.
 
+config USE_GENERIC_EARLY_PRINTK_8250
+        bool
+
 config CMDLINE_BOOL
         bool "Built-in kernel command line"
         default n